Oil filter



Dec. 19,- 1939.l

J. W. WILKINSON AE'l' AL on. FILTER Filed June 15, i957 am m m wwmmfmm I.1.1, u i

PatentedDec. 19, 1939 .UNI'IED STATESPPATENT OFFICE 2,183,811 y James W.Wilkinson and William Morgan, Leicester, Mass., and Thomas EdwardAldham, Providence, B. I., assignors to li'lemingr ManufacturingCompany, a corporation of Rhode Island Application Junel, 1937, SerialNo. 148.328 s calms. (cl. 21o-131) This invention relates to an oilfilter, more particularly of the type-to be used in connection with aninternal combustion engine such as an automobile engine. One of theobjects ofthe invention is to provide van inexpensive lter with aremovable cartridge so that the -accumulation of impurities gathered inthe cartridge from the oil may be thrown 'away with the used. cartridgeand the same replaced from timesto time with a fresh cartridge wherebythe oil will be kept clean. .y Another objectof the 'invention is toenable the filter cartridge to be removed with the cover for the outercasing by means of the cover for c the casing acting as a handle formanipulation.

l5 Another object of the invention is to provide a cartridge which,although attached to the cover cartridge which isimounted on the bag andwhichserves as a spacer to locate the bag'with reference to the outletopening and also a means for detachably connecting Athe cartridge to thecover.

Another and more specific object of the invention is the provision Vofspurs on the'attaching member to be-inserted into the fabric of a `bagcartridge by a relative movement of the two parts whereby the bag issecurely attached to this spacing member and forms with it a unit whichwill be placed into orremoved from the casing and thrown away as acomplete assembly. With these and other objects in view, the inventionconsists of certain'novel features of. construction; as will be morefully described, and particularly pointed out in the appended claims. Inthe accompanying drawings' Fig'. 1 is a sectional view through theiilter assembly;

Fig. 2 is an elevation'of the bag portion of the cartridge and showingthe spacing part and cover 5 for the casing in section with a portion ofthe bag broken away to show itsinterlor;

Fig..3 isa sectional view through the bag porv -ftion of the cartridgeand 'its cap along one part.

oi the attachment and on substantially line 3-3 Fig. 4 is a sectionalview uke'mg. 3 with the bag omitted;

Fig. 5 is a sectional view on line I-I of Fig. 2,

showing the interlocking connection between the' cartridge and thecover;

Fig. 6 is a. perspective'view of a fragmental portion of the detachablemeans for connecting the cover to the cap member of the cartridge.

Fig. 'I'is a top plan view of the central portion of the spacing memberwhich is attached to the 10' bag part of the cartridge;

Fig. 8 is a perspective view. of the hands of a person attaching the bagto the cap member of lthe cartridge;

Fig. 9 is largely an elevation of the assembly l5 at right angles tothat shown in Fig. 1 with a part in section.

Oil lters for automotive usel require in some instances an inexpensivefilter. .It is also desirable that connections of pipes andthe like beau not disturbed in the replacing ofthe cartridge when the same mayhave-become saturated or have collected therein a material amount ofimpurities gathered from the oil which is circulated through the same;and in order to provide for 25.

this a cartridge is inserted in the casing which may bel removed anddiscarded when occasion requiresaand we have provided a simple,inexpensive cartridge which consists ofa fabric bag of iilter materialand a cap attached to this bag; 30 the attachment of the cap to the bagbeing by a very simple expedient which may be easily .and quicklyapplied, and we have in turn provided a detachable connection betweenthe cap and the cover for. the casing which will enable the cover 85 toact as va. handle to withdraw the cartridge from the casing after whichthe cartridge'may be detached from the cover to be discarded; and thefollowing is a more detailed description of the present embodiment ofthis-.inventicmjllus- 'i0 trating the .preferred means'by which theseadvantageous resultsy be accomplished: c

With reference to the drawing, l0 designates the casing which is ofgenerally cylindrical shape Y with an integral outwardly bulging endorbottom .4.; wall Il having an opening'V i2 Ywith an inturned collarI3about the opening which is threaded as at I4 for connection to aconduit for insertion of loil into the casing. A cc'veri5 for the bedrportion" I0 of the casing is provided with a daags a@ i6 to extend overthe outer upper peripheral edge of the casing with a washer l1 betweenthe cover and the upper edge i8 of the casing for sealing the same whenthe cover is forced demie auch position. any sent 5 able clamp may beprovided for forcing the cover "into, closed position, but we haveillustrated as one form a bar I9 which extends over the top of the coverwith its ends located in openings 2|) in the upstanding ears 2| whichare xed to the outer surface of the casing. Through the center of thisbar I9 we provide a threaded opening 22 for the reception of thethreaded stud 23 and handle 24, which stud engages a recess 25 in thetop ofthe cover so that as the handle is turned the stud will force thecover downwardly to compress the washer i1 and form an effective sealbetween the cover and the upper edge of the' casing.

This casing bulges outwardly as at 26 with-an outlet opening 21 in thewall at this point. The stock about this opening 21 is turned inwardlyas at 28 to provide a' collar which is threaded as at 29 to receive theoutlet connection for a conduit to return the oil to the circulatingsysem of tho engine or the like, which oil is passed through the filterfor cleansing thereof. A sup- -fabric 'of the bag and then in theopposite direction we cause the other spurs porting wall 30 may extendacross the lower end of the casing, as illustrated in Fig. l, to spanthe bulging bottom, although this is not essential for the operation ofthe filter. i

The cartridge consists of a bag part 3l vand a cap part 32. The bag partis of exible porous material through which oil may seep or be forced,usually of cloth or cotton fabric in .which some suitable filter mediumsuch as cotton waste 33 is packed which may or may not be supported byVsome rigid or semi-rigid material. The waste is preferably chemicallytreated so as to cause the filter medium tobe more effective in use.

The cap 32 consists of a dome-shaped piece of material of a rigidcharacter, usually metal, the same being provided with a plurality ofopenings 34 so that oil which may be forced up into the cap may easilyiiow therefrom. This cap has a plurality of spurs 35 and 36 cut from thestock of the cap and deflected inwardly, such as shown in Fig. 4, whichspurs are located in pairs at intervals about the dome member orcap nearits edge. We have shown in Fig. 4.these spurs as comprising four sets,although any convenient number may be had. There arealso spurs 31provided by cutting from the stock of the cap and deflecting the sameinto contact. Then, by a relative rotative motion between thedome-shaped cap and the bag we cause the spurs such as 36 to piercethrough the by similarly rotating such -as 35 to -pierce throughthefabric of the bag. Thus; these spurs 'become firmly attached k tothebag, whereas by rocking action of the dome-shaped cap about the bagwe cause the spurs 31`to pierce through the fabric and become attached'to the 'bag- `Thus,

'65 andin yuse is handled as a unit to' be-inserted or ,f' taken Vfromthe `'casing 'and after use the complete assembly is -.discarded.

,tion the cap is attached to the bag permanently to detachably connectthis carand we provide a member, 5, which is welded to the member isdesirable tr ge to itheicover l5 'las Shown in Fig r' surface of1thejcver.y :This

""d lgnate'd'j generally 38, see Fig. 6, and consists of a centerportion 39 witharms 40 extending outwardly from this member, which formone inwardly, these spurs being pointed upwardly, as illustrated in Fig.2.

by this simple opera-r Y Y attaching part, while the other attachingpart of the detachable connection between the cap and the cover isformed in the cap by cutting slots 4| in the top of the cap. Thus, thecap and cover may be detachably connected by the ngers 40 of the member38 passing through the wide portions 42 of the slots in the cap and thenby rela-f tive'rotation being moved into the narrow portions 43 of theslots to extend beneath the cap, as shown in dotted lines in Fig. 5.Further, a slot, such as designated in Fig. 1 at 44, is provided for thereception of a screw driver.

After use of the filter the cover may be detached from the casing which,when lifted, draws with it the cartridge comprising both the cap and thebag. This cartridge may then be held by inserting a screw driver in theslot 44 and by rotation of the cover with reference to the cartridge thesame may be detached from the cartridge and discarded Without touchingthe oily cartridge with the hand. Thereafter, the new cartridge may besubstituted for the used one by locking the cap onto the cover and thesame inserted into the casing and the cover fastened down in a mannerwhich will require but a minute or two to complete the manipulation.

The cap serves not only as a means for detachably connecting thecartridge to the cover but also as a mea-ns for spacing the bagdownwardly from the outlet opening 21 so that the bag will not clog thisopening, it being understood that the pressure of the oilenteringthrough the inlet opening I3 will tend to force the cartridge upwardlyor toward the cover and being held or limited in its upward movement bythe cap will expand the cartridge and form a tight seal between the bagand the inner surface ofthe casing IGK.

The foregoing description is directed solely towards the constructionillustrated, but we desire it to be Yunderstood that we reserve theprivilege of resorting to all the mechanical changes to which the deviceis susceptible, the invention being defined. and limited only by theterms of the appended claims.

We clailn: v

1. In an oil filter, an outer casing comprising a hollow` body and acover therefor, inlet and outlet'openings in said casing adjacent theupper and lower parts thereof, a cartridge within the casing comprisinga flexible bag of lter vmaterial, means to position the cartridgeinwardly from the lower opening. and rigid means connected to the ba'gto position the cartridge inwardly from the upper opening and providedwith one part of a detachable means for connection to the cover, theother part of the detachable means being carried by said cover.

2. In an oil filter, an outer casing comprising a hollow body and acover therefor and having an inlet opening in the lower part of thecasing and an outlet opening in the upper part thereof, a. cartridgecomprising a flexible bag of lter material in said casing. and rigidmeans connected f' to the bag and detachably connectedto the cover andserving to space the cartridge bag inwardly of the outlet opening, y

3. In an oil fllter, an outer casing comprising a .hollow body and a`cover therefor and having an inlet opening in the lower part of thecasing and an outlet opening in the upper part thereof, a cartridgecomprising a exible bag of filter material in said casing, and a rigiddome-shaped member connected to the bag and detachably 4. In an oillter, an outer casing comprising a hollow body and a cover therefor andhaving an inlet opening in the lower part of the casing and an outletopening in the upper part thereof, a cartridge comprising a ilexible bagof lter material in said casing, and a rigid dome-shaped memberconnected to the bag and provided with one part of a detachablyinterlocking connection, and a member xed on the cover providing the.other part of said detachable connection.

5. A removable cartridge for a lter comprising a bag of lter material,and a. rigid domeshaped cap xed to the bag and removable therewith as aunit, said cap being relatively steep and shaped to space the baginwardly of the casingfor the same.

6. A removable cartridge fora lter comprising a bag of lter material,and a, rigid cap xed to the bag and removable therewith as a unit, saidcap carrying one part of means to detachably connect the same to aportion of the casing into which it is-inserted. g 'L'A removablecartridge for a filter comprising a bag of lter material, adome-shapedfcap,

and mechanical means to iix the cap to the bag by relative movements ofthe cap and bag comprising spurs provided on the cap to pierce andinterlock with the bag, said spurs extending inwardly of the cap anddisposed in generally opposite directions at intervals about the innercircumferential face of the cap near itsedge.

8. A removable cartridge fora ilter .comprising a bag of lter material,a rigid cap provided with integral means to x the cap to the bag.

9. A removable cartridge for a lter comprising a bag of filter material,a dome-shaped cap,

and spurs integral with the cap to x the cap to the bag, said spurspiercing the bag and interlocking therewith.

- JAMES W. WILKINSON.

WILLIAM MORGAN. 'THOMAS EDWARD ALDHAM.

